1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 339 



MIOCENE SPECIES. 



Ancylus undulatus Meek. 



Rep. Geo]. Expl. 40tli Parallel, vol. iv, part i, p. 186, pi. svii, figs. 12, 12a. Rev. 

 Non-Marine Foss. Moll., p. 45 or 451, pi. xxxii, fig. 10. Mus. No. 12532. 

 Auomla subcostata Conrad. ^ 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. v, p. 325, 

 pi. v, fig. 34. Mus. No. 1865. 

 Anomia subcostata Cnurad. 



Rep. U. S. & Mex. Bound. Surv., vol. i, part ii, p. 161, pi. xix, figs, la, h. Mus. No. 

 9830. 

 Area devincta Conrad. 



U. S. Expl. Exp. , vol. X, Geology, p. 726, pi. xviii, figs. 10, a. Mus. No. 3499. 

 Area microdoiita Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. v, pp. 323, 

 324, pi. iii, tig. 29. Mus. No. 1844, 



Area obispoana Conrad. 



Rep. Expls. & Survs. R. R. R. Mississipiji River to the Pacific Ocean, vol. vii,p. 



192, pi. V, fig. 1. Mus. No. 13330. 

 Arcopagia unda Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 192, 

 pi. iv, figs. 3, 4. Mus. No. 13328. 

 Astrodapsis antiselli Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 196, 

 pi. X, figs. 1, 2. Mus. No. 13337. 

 Axinea barbarensis Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 



194, pi. vi, fig. 3. Mus. No. 13358. 

 Balaiius estrellanus Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 



195, pi. viii, fig. 1. Mus. No. 13342. 

 Balauus estrellanus Conrad. 



Rep. Expls. »fc Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 

 195 (not the figured specimen). Mus. No. 13316. 

 Bulla petrosa Conrad. 



U. S. Expl. Exp. , vol. X, Geology, p. 727, pi. xix, fig. 8. Mus. No. 3607. 

 Cardita subtenta Conrad. 



U. S. Expl. Exp., vol. X, Geology, p. 726, pi. xviii, figs. 12, a. Mus. No. 3502. 

 Cardium modestum Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi to the Pacific, vol. v, p. 322, pi. iii, fig. 

 15. Mus. No. 1864. 



Crassatellrt collina Conrad. 



Rep. Expls. «& Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 



193, pi. vi,figs. 1, 2. Mus. No. 13339. 

 Crepidula praerupta Conrad. 



U. S. Expl. Exp. , vol. X, Geology, p. 727, pi. xix, figs. 9, a, 10a, b. Mus. Nos. 3496, 3564. 

 Cyelas estrellana Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, 

 p. 192, pf. vi, fig. 6. Mus. No. 13351. 

 Cyelas estrellaua Conrad. 



Rep. Expls. & Survs. R. R. R. Mississippi River to the Pacific Ocean, vol. vii, p. 

 192 (not the figured specimen). Mus. No. 13314. 



